Update charted to 0.4.8 and roll

packages/cli_util/example/main.dart

+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:async';
+
+import 'package:cli_util/cli_logging.dart';
+
+main(List<String> args) async {
+  bool verbose = args.contains('-v');
+  Logger logger = verbose ? new Logger.verbose() : new Logger.standard();
+
+  logger.stdout('Hello world!');
+  logger.trace('message 1');
+  await new Future.delayed(new Duration(milliseconds: 200));
+  logger.trace('message 2');
+  logger.trace('message 3');
+
+  Progress progress = logger.progress('doing some work');
+  await new Future.delayed(new Duration(seconds: 2));
+  progress.finish(showTiming: true);
+
+  logger.stdout('All ${logger.ansi.emphasized('done')}.');
+  logger.flush();
+}